Topographic mapping.
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Merchich", "ellipsoid": { "name": "Clarke 1880 (IGN)", "semi_major_axis": 6378249.2, "semi_minor_axis": 6356515 }, "scope": "Topographic mapping.", "area": "Africa - Morocco and Western Sahara - onshore.", "bbox": { "south_latitude": 20.71, "west_longitude": -17.16, "north_latitude": 35.97, "east_longitude": -1.01 }, "id": { "authority": "EPSG", "code": 6261 } }